基于改善30CrMo钢大棒材心部致密度轧制工艺有限元模拟

对表面和心部温度分别为1150℃和1240℃的30CrMo钢350 mm×450 mm铸坯轧制Φ230 mm棒材的工艺过程进行有限元模拟,以研究单道次10%～30%压下率、100 mm总压下量时双道次50 mm-50 mm、10 mm-90 mm、90 mm-10 mm等轧制工艺对棒材心部致密度的影响。结果表明,单道次压下率20%时心部致密度有一定改善,压下率30%改善明显;总压下量100 mm时50 mm-50 mm轧制工艺心部致密度改善最不明显,10 mm-90 mm工艺心部致密度改善最明显。现场轧制结果符合模拟结果。

Improvement of Centre Density of 30CrMo Steel Heavy Bar by Finite Element Simulation on Rolling Process

Finite element simulation on rolling process for 30CrMo steel 350 mm x 450 mm casting bloom with surface 1 150 ℃ and canter 1 240 ℃ rolling to 0230 mm bar products is earned out to study effect of rolling parameters including single pass 10% ~ 30% reduction ratio, double pass reduction 50 mm-50 mm, 10 mm-90 mm and 90 mm-10 mm at total reduction 100 mm on canter density of bar. Results show that with single pass reduction ratio 20% the canter density has definite improvement, and with 30% canter density has obvious improvement ； at total' reduction ratio 100 mm, the improvement of canter density is not obvious by 50 mm-50 mm rolling process, but the improvement of canter density is most obvious by 10 mm-90 mm rolling process. The rolling results at situ are corresponding to the simulation results.